Toward miniaturized undulators with L1(0) phase FePt micromagnet array

Gürel, Derya Berkin and Gunduz Akdogan, Nilay and Aksoy, Avni and Akdogan, Ozan (2022) Toward miniaturized undulators with L1(0) phase FePt micromagnet array. Physica Status Solidi (A) Applications and Materials Science, 219 (12). ISSN 1862-6300 (Print) 1862-6319 (Online)

Full text not available from this repository. (Request a copy)


An undulator is a required part for building free-electron lasers (FELs) upon which a large body of the literature has expressed interest for the applications in various areas such as the defense industry, material science, and medicine. The current state of the art of X-FEL uses an undulator period down to 3 cm, which creates an output radiation wavelength down to 1.5 A using ≈14 GeV e-beam. By developing a mm/sub-mm period undulator (i.e., a period of 300 μm), it is possible to obtain the same output radiation wavelength with a much less e-beam energy of ≈1.4 GeV. Thus, compact XFELs could become a reality. In this work, FePt thin films and micromagnets are synthesized by the sputtering deposition technique, and their properties are studied. The X-ray diffraction (XRD) pattern indicated that the crystal structure transformed from face-centered cubic (FCC) to L10 face-centered tetragonal (FCT) phase upon annealing. Room temperature coercivity of the structures reached up to 1.4 Tesla. Undulator prototype is developed and the performance tests are done using Genesis simulation. Simulations yield output radiation with 0.52 nm wavelength and 0.7 GW peak power. Synthesized FePt micromagnets could be utilized in next-generation miniaturized undulators.
Item Type: Article
Uncontrolled Keywords: magnetic materials; undulators; XFEL
Divisions: Faculty of Engineering and Natural Sciences
Depositing User: Derya Berkin Gürel
Date Deposited: 23 Aug 2022 22:23
Last Modified: 23 Aug 2022 22:23

Actions (login required)

View Item
View Item